Acer SA220QBbix User Manual page 23

11. Auto Config: Press this button to activate the Auto Adjustment function. The Auto adjustment
function is used to set the HPos, VPos, Clock and Focus. (Only available on VGA port.)
12. H. Position: Adjust the horizontal position of the picture.
13. V. Position: Adjust the vertical position of the picture.
14. Focus: Adjust clk phase to ADC.
15. Clock: Adjust ADC Clock Fast Lock.